Servo Magazine (February 2008)
Capacity: The Key to Battery Runtime
A look at emerging rapid-test technologies for deep-cycle, lead-acid batteries | The secret of battery runtime lies in the capacity. Capacity defines the energy a battery can hold. The definition for capacity is usually given in ampere-hours (Ah); it specifies the elapsed time when discharging a battery at a calibrated current to the end-of-discharge voltage. Portable batteries commonly use a one hour discharge; larger batteries are rated at either a five or 20 hour discharge period...